Stadium: Centre Court Round: 14 Ground: Clay
| Challenger Cordenons | 2023/08/08 16:00 | Michael Vrbensky v Francesco Passaro | 2-6,0-6 |
| Challenger Liberec | 2023/08/03 08:00 | Francisco Comesana v Michael Vrbensky | 7-5,6-4 |
| Challenger Liberec | 2023/08/01 12:30 | Michael Vrbensky v Valentin Royer | 6-4,2-6,6-4 |
| Challenger Liberec | 2023/07/31 11:05 | Michael Vrbensky v Yanaki Milev | 6-4,6-2 |
| Challenger Liberec | 2023/07/30 14:40 | Michael Vrbensky v Dominik Kellovsky | 6-1,6-2 |
| Challenger Zug | 2023/07/24 11:40 | Manuel Guinard v Michael Vrbensky | 6-0,7-6 |
| Challenger Zug | 2023/07/23 11:50 | Kirill Kivattsev v Michael Vrbensky | 2-6,2-6 |
| Challenger Amersfoort | 2023/07/18 15:25 | Michael Vrbensky v Titouan Droguet | 1-6,4-6 |
| Challenger Grodzisk Mazowiecki | 2023/08/13 13:20 | Szymon Kielan v Alex Knaff | 3-6,0-6 |
| ITF M25 Lodz | 2023/08/09 17:15 | Szymon Kielan v Patrick Kaukovalta | 6-7,4-6 |
| ITF M15 Novi Sad | 2023/08/02 13:50 | Szymon Kielan v Stefan Popovic | 2-6,1-6 |
| ITF M15 Sofia | 2023/07/06 06:30 | Szymon Kielan v Andreja Petrovic | 6-3,6-3 |
| ITF M15 Sofia | 2023/07/04 07:00 | Federico Agustin Gomez v Szymon Kielan | 2-6,3-6 |
| ITF M15 Wroclaw | 2023/06/27 08:00 | Tyler Zink v Szymon Kielan | 6-3,6-1 |
| ITF M15 Monastir | 2023/04/19 11:10 | Shunsuke Nakagawa v Szymon Kielan | 6-4,6-1 |
| ITF M15 Monastir | 2023/04/13 08:30 | Szymon Kielan v Daniel Rodrigues | 2-6,2-6 |